High-friction inverted rubber makes the ball extremely aggressive. It enjoys the characteristics of great viscosity, high friction, long viscosity maintenance, translucent pimples and soft & smooth appearance. Adopting TENSION technology, the rubber's stretching strength is enhanced. High elasticity can be achieved without use of quick glue. The combination of Higher sponge and this inverted rubber makes it easy to produce arc, thus gives full play to the rubber's high friction.